Web page performance scoring

ABSTRACT

A browser-based tool is provided that loads a Webpage, accesses the document object model (DOM) of the page, collects information about the page structure and parses the page, determines through the use of heuristics such factors as how much text is found on the page and the like, produces statistical breakdown of the page, and calculates a score based on performance of the page. Key to the operation of the invention is the ability to observe operation of the Webpage as it actually loads in real time, scoring the page for several of various performance factors, and producing a combined score for the various factors.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates to a global telecommunications network. More particularly, the invention relates to a tool which analyses the content and structure of Web pages in real time and produces statistics and a performance score.

2. Description of the Prior Art

Web page performance affects the quality of experience for visitors, as well as server performance requirements. Web page performance depends upon many factors, such as the number and sizes of files required to display the page, the organization of the page, the result of any modifications to the page performed by script, and the configuration of the Web server(s) hosting the content.

WebSiteOptimization.com (see FIGS. 1 a-1 c) offers a product which is designated Web Page Analyzer-0.82. In using this product, a user enters a URL into a field within a Web page form to invoke a script that accesses the Web page associated with the entered URL. The script calculates Web page size 11, composition 12, and download time 13. The script also calculates the size of individual elements 14 and finds the total for each type of Web page component 15. Based on these page characteristics the script then offers advice 16 derived from anecdotal evidence and prior experience on how to improve page display time.

While determining file sizes can be accomplished relatively easily, determining the actual page content, the effects of the page structure, and server configuration is more difficult. Such determination typically requires reliance upon experimental data that depends upon the availability of network connections of varying speeds, as is the case with Web Page Analyzer-0.82.

It would be advantageous to provide a Web developer with the means to determine the relative performance of a Web page quickly, without having to rely upon experimental and anecdotal data that also depend upon the availability of network connections of varying speeds.

SUMMARY OF THE INVENTION

The invention comprises a tool that provides a Web developer with the means to determine the relative performance of a Web page quickly, in real time, without having to rely upon experimental and anecdotal data that is also dependent upon the availability of network connections of varying speeds. Deployment and use of this tool as a means of measuring and enforcing coding techniques which improve Web page performance can potentially provide a competitive advantage over competitor Web sites which do not optimize their content for performance.

The presently preferred embodiment of the invention comprises a browser-based tool that loads a Web page, accesses the document object model (DOM) of the page, collects information about the page structure and parses the page, determines through the use of heuristics such factors as how much text is found on the page and the like, produces a statistical breakdown of the page, and calculates a score based on performance of the page. Key to the operation of the invention is the ability to observe operation of the Web page as it actually loads in real time, scoring the page for several of various performance factors, and producing a combined score for the various factors. It is also possible to operate the invention such that it runs without user interaction and observation, for example on a server.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 a-1 c illustrate a Web page report according to the state of the art;

FIGS. 2 a-2 l illustrate a Web page report according to the invention; and

FIGS. 3 a and 3 b provide a flow diagram of a method for Web page performance scoring using a browser-based tool according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The invention comprises a tool that provides a Web developer with the means to determine the relative performance of a Web page quickly, in real time, without having to rely upon experimental and anecdotal data that is also dependent upon the availability of network connections of varying speeds. Deployment and use of this tool as a means of measuring and enforcing coding techniques which improve Web page performance can potentially provide a competitive advantage over competitor Websites which do not optimize their content for performance.

This tool can be used:

-   -   By individual Web developers to measure the relative performance         of their Web pages interactively as they are being developed.     -   To report detailed statistics for a Web page.     -   As a process control measurement tool, which is run         automatically, to determine performance scores for an entire Web         site.

One embodiment of the Web page scoring tool disclosed herein provides a method of calculating a score which is a measure of the potential page load performance of the pages in a Web site for visitors with varying network performance characteristics. The tool can visit either a single page, or all pages linked from a page up to a specified depth while providing scores, overall statistics, and details for each included file.

Browser Configuration

The tool is designed to be run as a Web page using a browser, such as the Netscape Gecko-based browser. In the embodiment that comprises a Netscape Gecko-based browser, XPConnect is used to obtain information from the browser's cache regarding the files included by a Web page.

Operation

The tool operation occurs in two phases:

-   -   Collecting Information; and     -   Reporting.

The tool must first load the page or pages to be analyzed. Once the pages have been loaded, various reports can be generated for different network and user parameters without having to load the pages again.

Collecting Information

URL

Enter the URL of the Web page or site to be analyzed.

Depth

Choose a depth for the tool to follow links from the starting URL. A depth of 0 only loads and analyzes a single page. A depth of 1 analyzes the starting page and all pages linked to from the starting page.

Restrict Urls

Choose whether to restrict Urls. Restricting Urls prevents the tool from following any link which does not begin with the starting url. For example, if the starting Url is http://cnn.com/ and all links begin with http://www.cnn.com, then the tool does not follow the links if Restrict Urn is checked.

Page Timeout

Choose a page timeout value. This value (in seconds) is the time the tool waits for a page to load before timing out and entering the pause state.

If it is desired to save the parameters in the form of a Url which can be reused in the form of a hyperlink, click Save Parameters, which creates a Url in the browser's location bar which has be saved.

Click Run to start loading and analyzing the Web page(s). One may Pause, Restart, or Stop the tool.

While it is running, the tool provides feedback on which page is currently being loaded and how many pages have been loaded so far, as well as how many pages remain to be loaded.

Reporting

Once the tool has finished loading all pages, the reports can be generated. The scores reported by the tool depend upon the values entered for the network and visitor parameters. It is possible to run the reports with differing parameters without having to re-load and re-analyze the pages each time.

Network Parameters

The actual page load performance of a Web page depends upon the visitor's network connection. The network parameters allow the user to calculate scores for the various types of visitor expected, such as dialup, Cable/DSL broadband, or Satellite broadband.

Bandwidth

Enter the bandwidth (in Bytes/Second) of the visitor's connection. A typical dialup visitor using a 56 kbps modem might have a bandwidth of 4096 Bytes/Second.

Compression

Enter the modem compression factor available to the visitor. A value of 1.0 means no compression, while a factor of 0.25 means the modem is able to compress text to 25% of its original size. Cable/DSL/Satellite broadband visitors typically have no compression and this value should be set to 1.0

DNS Lookup

Enter the time in seconds for the visitor's client to perform a DNS Lookup. Typical values for dialup users are on the order of 0.5 to 1.0 second; for Cable/DSL broadband on the order of 0.1 to 0.7 second; while Satellite broadband may see values in excess of 1.5 to two seconds.

Ping Latency

Enter the time in seconds for a ping to travel from the visitor's machine to the Web server and back. Typical values for a dialup user are on the order of 0.3 seconds; Cable/DSL broadband on the order of 0.1 seconds; while Satellite broadband may see values in excess of 1.5 seconds.

Important Note regarding Satellite Broadband

Due to the high latency implicit in Satellite broadband, Web pages which score well for dialup or Cable/DSL visitors may have an extremely poor score for Satellite broadband visitors. Approximately 30 million homes in the United States, as well as many others in other countries, do not have the option of using Cable or DSL broadband. Optimizing content for Satellite broadband visitors is an important consideration.

Visitor Parameters

The perceived performance of a Web page depends upon the user's behavior, e.g. how often the visitor returns to the page, how long does the visitor spend on page before clicking on a link, and how much time they consider it reasonable for a page to load.

Revisit Time

Enter the Revisit Time (in seconds) which measures how often a visitor returns to a page. This value is used to determine which files have unexpired cache entries when the visitor returns.

IntraPage Time

Enter the IntraPage Time (in seconds) which measures how long the visitor views a page before clicking on a link. This value is used to determine which files have unexpired cache entries when visiting links and is used to calculate a score for each page a visitor may click once the original page has loaded.

Perception Time

Enter the Perception Time (in seconds) which is used to measure the impatience of a visitor. A dialup user may be more tolerable of slow loading pages than a broadband visitor. A value of ten seconds for a dialup visitor is reasonable, while a value for a Cable/DSL broadband user may be much less.

Once all reporting parameters are entered, the user can either click on Report or Save Report to generate a report. To generate multiple reports on the same Web page(s) using different parameters, simply change the report parameters and click either Report or Save Report again.

The Report button dynamically creates a report in a new window. This option is quick and simple however it does not create a window that can be saved or forwarded to another user. To save a report in a format which can be saved locally or forwarded to another user, click the Save Report button. If the user clicks the Save Report button, a hyperlink appears in the message pane when the report is ready. Click on the link to open a new window which can be saved locally, forwarded in email, etc.

Interpreting Reports

Results are not absolute and must be interpreted. What works for one visitor may not work for another. For example, a dialup user with slow download speeds but relatively fast DNS Lookup and Ping times may find that a page which uses external files for scripts and CSS performs better than one without. On the other hand, a satellite broadband user with high download speeds and slow DNS Lookups and Ping times may find that a page which uses inline Script and CSS performs much better than the equivalent page using external files. Use these reports appropriately for the site in question and expected audience.

One of the most important influences of a Web page's performance is due to the caching configuration of the Web servers. Appropriately cached files do not require network traffic and improve both the experience of dialup, as well as satellite broadband users.

Parameters

The Parameters section of the report shows the values use to calculate the scores for the pages. Individual scores must be interpreted with these parameters in mind because the same page may have widely varying scores depending upon the parameters chosen.

Page

Each page report begins with Page: url Score value. The score is the value for the total First Visit score which assumes that no files have been cached and includes the time to download all content for the page.

Page Scores

The Page Scores table provides a breakdown of the scoring for a page by First/Second visit versus Blocking/Total.

The First Visit score assumes the visitor has not been to the site before or that their cache has been emptied. The Second Visit score assumes the visitor has previously visited the page and is revisiting after the time specified by the Revisit Time parameter. Comparing First Visit to Second Visit scores can indicate the effectiveness of the caching strategies in use on the site.

First and Second Visit scores are also broken down by Blocking versus Total. The Total Score is calculated from the time required to load all files required by the page. The Blocking score is calculated solely from files which may potentially block the display of a page until they have been downloaded. Blocking scores are intended to give a measure of how quickly the user experiences some feedback that the page is loading.

Notes

The Notes section contains comments which are intended to indicate that improvements may be possible with further investigation.

Summary Statistics

The Summary Statistics section contains summary information regarding the Web page such as if the document is compressed, the total size, number of domain lookups which may be required, etc.

File Cache Data

The File Cache Data section follows the Summary Statistics section and contains detailed cache information for each file included in the Web page. The HTTP Header is in red if the date reported by the Web server are more than an hour different from the time the page was analyzed. This can be useful in ensuring that the Web server's dates are properly set.

Links

If Depth was set to greater than 0, the Link Section of the report lists each link found on the page, along with an effective score which measures the time required to load the linked page, once the original page's content has been loaded. These scores can be used to determine the benefit of caching common files across a site.

Example Reports

The following reports were generated for CNN.com using a dialup 56 K modem with a 40 kbps connection using identical Visitor parameters (revisit after one day) while varying the Network parameters.

Dialup

Bandwidth 4096, Compression 0.25, DNS Lookup 1.0, Ping Latency 0.3

Web Page Scoring

Parameters

Date Run Tue Jul 08 2003 13:09:31 GMT-0400 (Eastern Daylight Time) Bandwidth 4096 Compression 0.25 DNS Lookup Time 1 Ping Latency 0.3 Revisit Time 86400 IntraPage Time 60 User Perception Time 10 Page: http://cnn.com/Score5.17

Page Scores

Blocking Total First Visit 1.32 5.17 Second Visit 1.32 5.13 Notes consider reducing redirections consider reducing domain lookups reduce whitespace consider moving external scripts to inline or reducing domain lookups

Summary Statistics

Actual Load Time 42.872 Total Size 173885 Document Compressed false Redirects 2 Total Domains 5 Blocking Domains 4 Non Blocking Domains 1 Domains cnn.com, www.cnn.com, i.cnn.net, ar.atwola.com, i.a.cnn.net Extra Whitespace 5149 Inline Script Count 6 Inline Script Size 1236 External Script Count 11 External Script Size 35033 Inline Style Count 1 Inline Style Size 110 External Style Count 3 External Style Size 25910 DOM Depth 26 Table Depth 5

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http://ar.atwola.com/html/93137910/48441749/aol?SNM=HIDBFV&width=101&height=1&target=top&TZ=240&TVAR=class%3Dus.low&CT=J&hw=docw

Size 267 Binary False Blocking true Redirected to Modified Tue Jul 08 2003 13:09:02 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: application/x- javascript Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:19 GMT Date: Tue, 08 Jul 2003 17:10:19 GMT Content-Length: 267

http://ar.atwola.com/file/adsEnd.js

Size 1551 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:09:02 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:27 GMT Date: Tue, 08 Jul 2003 17:10:27 GMT Content-Length: 1551 Content-Type: application/x- javascript

http://www.cnn.com/cookie.crumb

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:14 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 17:10:31 GMT Content-Length: 43 Content-Type: image/gif URL Total Score

Links Cable

Bandwidth 40960, Compression 1.0, DNS Lookup 1.0, Ping Latency 0.1

Web Page Scoring

Parameters

Date Run Tue Jul 08 2003 13:11:13 GMT-0400 (Eastern Daylight Time) Bandwidth 40960 Compression 1 DNS Lookup Time 1 Ping Latency 0.1 Revisit Time 86400 IntraPage Time 60 User Perception Time 10 Page: http://cnn.com/Score2

Page Scores

Blocking Total First Visit 0.76 2 Second Visit 0.76 1.98 Notes consider reducing redirections consider reducing domain lookups consider moving external scripts to inline or reducing domain lookups consider moving external css to inline or reducing domain lookups first visit: blocking latency dominates size second visit: blocking latency dominates size

Summary Statistics

Actual Load Time 42.872 Total Size 173885 Document Compressed false Redirects 2 Total Domains 5 Blocking Domains 4 Non Blocking Domains 1 Domains cnn.com, www.cnn.com, i.cnn.net, ar.atwola.com, i.a.cnn.net Extra Whitespace 5149 Inline Script Count 6 Inline Script Size 1236 External Script Count 11 External Script Size 35033 Inline Style Count 1 Inline Style Size 110 External Style Count 3 External Style Size 25910 DOM Depth 26 Table Depth 5

http://cnn.com/

Size 0 Binary false Blocking false Redirected to http://www.cnn.com/ Modified Tue Jul 08 2003 13:08:42 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 302 Moved Temporarily Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 17:10:02 GMT Location: http://www.cnn.com/ Content-Length: 0 Content-Type: text/html

http://www.cnn.com/

Size 56730 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:08:52 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:42 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 17:10:02 GMT Last-Modified: Tue, 08 Jul 2003 17:10:00 GMT Expires: Tue, 08 Jul 2003 17:11:00 GMT Cache-Control: private, max-age = 60 Content-Type: text/html

http://i.cnn.net/cnn/.element/ssi/css/1.0/main.css

Size 25910 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:51 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:45 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Wed, 25 Jun 2003 15:05:51 GMT Content-Type: text/css Last-Modified: Wed, 25 Jun 2003 15:04:29 GMT Content-Length: 25910 Accept-Ranges: bytes Age: 8543 X-Cache: HIT from i.cnn.net

http://i.cnn.net/cnn/.element/ssi/js/1.0/main.js

Size 21613 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:54 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:52 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Thu, 26 Jun 2003 03:34:13 GMT Content-Type: application/x- javascript Last-Modified: Mon, 17 Mar 2003 20:13:07 GMT Content-Length: 21613 Accept-Ranges: bytes Age: 787 X-Cache: HIT from i.cnn.net

http://ar.atwola.com/file/adsWrapper.js

Size 6039 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:57 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:08:55 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:11 GMT Date: Tue, 08 Jul 2003 17:10:11 GMT Content-Length: 6039 Content-Type: application/x- javascript

http://ar.atwola.com/file/adsPopup2.js

Size 5563 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:08:57 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:14 GMT Date: Tue, 08 Jul 2003 17:10:14 GMT Content-Length: 5563 Content-Type: application/x- javascript

http://i.cnn.net/cnn/images/1.gif

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Fri, 20 Jun 2003 15:36:44 GMT Content-Type: image/gif Last-Modified: Tue, 27 May 2003 19:00:10 GMT Content-Length: 43 Accept-Ranges: bytes Age: 2813 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/logo/cnn.gif

Size 1910 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 14:02:08 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 1910 Accept-Ranges: bytes Cache-Control: max-age = 3190 Date: Tue, 08 Jul 2003 17:10:17 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/html/93103287/48441749/aol?SNM=HIDBFV&width=468&height=60&target=top&TZ=240&TVAR=class%3Dus.low&CT=I

Size 402 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: text/html Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:15 GMT Date: Tue, 08 Jul 2003 17:10:15 GMT Content-Length: 402

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.search.gif

Size 1107 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:20:05 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 1107 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 667 Date: Tue, 08 Jul 2003 17:10:17 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.top.bevel.gif

Size 181 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:00 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:34:50 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 181 Accept-Ranges: bytes Cache-Control: max-age = 1552 Date: Tue, 08 Jul 2003 17:10:18 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.right.bevel.gif

Size 299 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:00 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:33:30 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 299 Accept-Ranges: bytes Cache-Control: max-age = 1472 Date: Tue, 08 Jul 2003 17:10:18 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.google.gif

Size 1273 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:01 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:32:54 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 1273 Accept-Ranges: bytes Cache-Control: max-age = 1436 Date: Tue, 08 Jul 2003 17:10:18 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.bottom.bevel.gif

Size 211 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:01 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:15:13 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 211 Accept-Ranges: bytes Cache-Control: max-age = 375 Date: Tue, 08 Jul 2003 17:10:19 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/nav_at_money.gif

Size 90 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:03 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:31:57 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 90 Accept-Ranges: bytes Cache-Control: max-age = 1379 Date: Tue, 08 Jul 2003 17:10:20 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/nav_at_si.gif

Size 82 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:05 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:49:07 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 82 Accept-Ranges: bytes Cache-Control: max-age = 2409 Date: Tue, 08 Jul 2003 17:10:20 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/html/93166917/48441749/aol?SNM=HIDBFV&width=120&height=90&target=top&TZ=240&TVAR=class%3Dus.low&CT=I

Size 410 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:09:00 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: text/html Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:18 GMT Date: Tue, 08 Jul 2003 17:10:18 GMT Content-Length: 410

http://i.a.cnn.net/cnn/.element/img/1.0/sect/SEARCH/nav.search.gif

Size 1105 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:06 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:15:27 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:28 GMT Content-Length: 1105 Accept-Ranges: bytes Cache-Control: max-age = 389 Date: Tue, 08 Jul 2003 17:10:22 GMT Surrogate-Server: AkamaiGHost

http://i.cnn.net/cnn/2003/images/07/08/top.miss.meridian.gif

Size 9497 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:06 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:00 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 16:12:13 GMT Content-Type: image/gif Last-Modified: Tue, 08 Jul 2003 16:09:13 GMT Content-Length: 9497 Accept-Ranges: bytes Age: 2162 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/main/px_c00.gif

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:08 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:39:02 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 43 Accept-Ranges: bytes Cache-Control: max-age = 1804 Date: Tue, 08 Jul 2003 17:10:24 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/userpicks.gif

Size 151 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:10 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:24:45 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 151 Accept-Ranges: bytes Cache-Control: max-age = 947 Date: Tue, 08 Jul 2003 17:10:25 GMT Surrogate-Server: AkamaiGHost

http://i.cnn.net/cnn/.element/img/1.0/misc/premium.gif

Size 74 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Thu, 26 Jun 2003 03:06:00 GMT Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 74 Accept-Ranges: bytes Age: 12938 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/main/px_ccc.gif

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:10 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:28:53 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 43 Accept-Ranges: bytes Cache-Control: max-age = 1195 Date: Tue, 08 Jul 2003 17:10:26 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/misc/audio.gif

Size 61 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:23:38 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:27 GMT Content-Length: 61 Accept-Ranges: bytes Cache-Control: max-age = 880 Date: Tue, 08 Jul 2003 17:10:28 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/images/1.gif

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:39:49 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Tue, 27 May 2003 19:00:10 GMT Content-Length: 43 Accept-Ranges: bytes Cache-Control: max-age = 1851 Date: Tue, 08 Jul 2003 17:10:29 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/more.video.blue.gif

Size 153 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:25:02 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 153 Accept-Ranges: bytes Cache-Control: max-age = 964 Date: Tue, 08 Jul 2003 17:10:30 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/images/icons/premium.gif

Size 74 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:12 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:34:35 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Last-Modified: Wed, 13 Mar 2002 21:19:25 GMT Accept-Ranges: bytes Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Content-Length: 74 Surrogate-Server: AkamaiGHost, AkamaiGHost, AkamaiGHost Cache-Control: max-age = 1537 Expires: Tue, 08 Jul 2003 17:36:07 GMT Date: Tue, 08 Jul 2003 17:10:30 GMT

http://i.a.cnn.net/cnn/video/iraq/2003/07/08/ja.baghd.at.night.vs.cnn.jpg

Size 5388 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:13 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:24:19 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/jpeg Last-Modified: Tue, 08 Jul 2003 05:48:35 GMT Content-Length: 5388 Accept-Ranges: bytes Cache-Control: max-age = 921 Date: Tue, 08 Jul 2003 17:10:30 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/superlinks/health.gif

Size 161 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:13 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:32:16 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 161 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 1398 Date: Tue, 08 Jul 2003 17:10:30 GMT

http://i.a.cnn.net/cnn/2003/HEALTH/07/08/otsc.gupta/tz.gupta.jpg

Size 3702 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:14 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:34:28 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/jpeg Last-Modified: Tue, 08 Jul 2003 13:26:21 GMT Content-Length: 3702 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 1530 Date: Tue, 08 Jul 2003 17:10:32 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/main/at_cnnmoney.gif

Size 559 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:14 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:23:25 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 559 Accept-Ranges: bytes Cache-Control: max-age = 867 Date: Tue, 08 Jul 2003 17:10:32 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/business.news.blue.gif

Size 169 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:15 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 14:00:21 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 169 Accept-Ranges: bytes Cache-Control: max-age = 3083 Date: Tue, 08 Jul 2003 17:10:33 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/image/93103306/aol

Size 0 Binary true Blocking false Redirected to http://ar.atwola.com/content/B0/0/ H7pTL2Luf0_kw3xmlj8W1sns8a9RRNke8_SAqLz- KBa609jmULHVa8jgFKtiL69KXTPCmjMkYOv- M5C_xF3lKNjRbUvMSjKyxE7A6B3LIHANk$/aol Modified Tue Jul 08 2003 13:09:00 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 302 Found Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:16 GMT Location: http://ar.atwola.com/content/B0/0/ H7pTL2Luf0_kw3xmlj8W1sns8a9RRNke8_SAqLz- KBa609jmULHVa8jgFKtiL69KXTPCmjMkYOv- M5C_xF3lKNjRbUvMSjKyxE7A6B3LIHANk$/aol P3P: CP = “CUR TAI PSA UNI COM NAV STA NOI OUR” Date: Tue, 08 Jul 2003 17:10:16 GMT Content-Length: 0

http://ar.atwola.com/content/B0/0/H7pTL2Luf0_kw3xmlj8W1sns8a9RRNke8_SAqLzKBa609jmULHVa8jgFKtiL69KXTPCmjMkYOvM5C_xF3lKNjRbUvMSjKyxE7A6B3LIHAN k$/aol

Size 696 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:09:05 GMT-0400 (Eastern Daylight Time) Expires Fri Jul 11 2003 13:09:00 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Last-Modified: Sat, 05 Jul 2003 17:10:20 GMT Expires: Fri, 11 Jul 2003 17:10:20 GMT Date: Tue, 08 Jul 2003 17:10:20 GMT Content-Length: 696 Content-Type: image/gif

http://i.cnn.net/cnn/.element/img/1.0/main/arrow_down.gif

Size 70 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:02 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:02 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Thu, 26 Jun 2003 03:01:27 GMT Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 70 Accept-Ranges: bytes Age: 1724 X-Cache: HIT from i.cnn.net

http://i.cnn.net/cnn/.element/img/1.0/main/arrow_up.gif

Size 70 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:06 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:06 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Sat, 21 Jun 2003 05:12:01 GMT Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 70 Accept-Ranges: bytes Age: 8558 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/main/ftn.breaking.alerts.gif

Size 1919 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:15 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:36:45 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 1919 Accept-Ranges: bytes Cache-Control: max-age = 1667 Date: Tue, 08 Jul 2003 17:10:33 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/ftn.345x32.try.timeMay03.gif

Size 2035 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:16 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:18:33 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 07 Jul 2003 20:55:34 GMT Content-Length: 2035 Accept-Ranges: bytes Cache-Control: max-age = 575 Date: Tue, 08 Jul 2003 17:10:33 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/superlinks/reports.gif

Size 170 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:16 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:57:16 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 170 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 2898 Date: Tue, 08 Jul 2003 17:10:34 GMT

http://i.a.cnn.net/cnn/images/programming.boxes/tz.machu.picchu.jpg

Size 1050 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:16 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:19:50 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/jpeg Last-Modified: Mon, 07 Jul 2003 20:35:45 GMT Content-Length: 1050 Accept-Ranges: bytes Cache-Control: max-age = 652 Date: Tue, 08 Jul 2003 17:10:35 GMT Surrogate-Server: AkamaiGHost

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Size 352 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:17 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:25:22 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 352 Accept-Ranges: bytes Cache-Control: max-age = 984 Date: Tue, 08 Jul 2003 17:10:35 GMT Surrogate-Server: AkamaiGHost

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Size 456 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:18 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:57:41 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 456 Accept-Ranges: bytes Cache-Control: max-age = 2923 Date: Tue, 08 Jul 2003 17:10:36 GMT Surrogate-Server: AkamaiGHost

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Size 104 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:09 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:09 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Fri, 20 Jun 2003 15:39:46 GMT Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 104 Accept-Ranges: bytes Age: 11403 X-Cache: HIT from i.cnn.net

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Size 484 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:18 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:47:26 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 484 Accept-Ranges: bytes Cache-Control: max-age = 2308 Date: Tue, 08 Jul 2003 17:10:36 GMT Surrogate-Server: AkamaiGHost

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Size 394 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:18 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:59:39 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 394 Accept-Ranges: bytes Cache-Control: max-age = 3041 Date: Tue, 08 Jul 2003 17:10:37 GMT Surrogate-Server: AkamaiGHost

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Size 448 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:19 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:40:46 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 448 Accept-Ranges: bytes Cache-Control: max-age = 1908 Date: Tue, 08 Jul 2003 17:10:37 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/space.gif

Size 914 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:19 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:28:53 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 914 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 1195 Date: Tue, 08 Jul 2003 17:10:37 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/main/travel.gif

Size 442 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:19 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:37:01 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 442 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 1683 Date: Tue, 08 Jul 2003 17:10:37 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/main/education.gif

Size 536 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:19 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:16:18 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 536 Accept-Ranges: bytes Cache-Control: max-age = 440 Date: Tue, 08 Jul 2003 17:10:38 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/sports.gif

Size 452 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:20 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 14:02:04 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 452 Accept-Ranges: bytes Cache-Control: max-age = 3186 Date: Tue, 08 Jul 2003 17:10:38 GMT Surrogate-Server: AkamaiGHost

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Size 515 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:20 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:19:24 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 515 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 626 Date: Tue, 08 Jul 2003 17:10:38 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/misc/diagonal.gif

Size 86 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:20 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:43:03 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:27 GMT Content-Length: 86 Accept-Ranges: bytes Cache-Control: max-age = 2045 Date: Tue, 08 Jul 2003 17:10:38 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/.element/img/1.0/main/tv.schedule.gif

Size 161 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:20 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:19:12 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 161 Accept-Ranges: bytes Cache-Control: max-age = 614 Date: Tue, 08 Jul 2003 17:10:39 GMT Surrogate-Server: AkamaiGHost

http://i.cnn.net/cnn/CNN/Programs/includes/showbox/images/paula.zahn.gif

Size 3762 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:09 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Thu, 22 May 2003 22:29:24 GMT Content-Type: image/gif Last-Modified: Sun, 18 Aug 2002 18:22:27 GMT Content-Length: 3762 Accept-Ranges: bytes Age: 67768 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/main/superlinks/us.gif

Size 145 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:20 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:23:54 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 145 Accept-Ranges: bytes Cache-Control: max-age = 896 Date: Tue, 08 Jul 2003 17:10:39 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/2003/US/07/08/nyt.kristof/tz.blair.jpg

Size 4091 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:22 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:56:56 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/jpeg Last-Modified: Tue, 08 Jul 2003 15:48:13 GMT Content-Length: 4091 Accept-Ranges: bytes Cache-Control: max-age = 2878 Date: Tue, 08 Jul 2003 17:10:39 GMT Surrogate-Server: AkamaiGHost

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Size 171 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:22 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:42:20 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 171 Accept-Ranges: bytes Cache-Control: max-age = 2002 Date: Tue, 08 Jul 2003 17:10:39 GMT Surrogate-Server: AkamaiGHost

http://i.a.cnn.net/cnn/2003/US/Southwest/07/08/offbeat.editor.fired/tz.caddyshack.jpg

Size 2064 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:23 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:53:26 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/jpeg Last-Modified: Tue, 08 Jul 2003 16:37:42 GMT Content-Length: 2064 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 2667 Date: Tue, 08 Jul 2003 17:10:40 GMT

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Size 1437 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:23 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:50:00 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 1437 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 2461 Date: Tue, 08 Jul 2003 17:10:41 GMT

http://i.a.cnn.net/cnn/.element/img/1.0/main/icon_external.gif

Size 104 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:23 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:32:52 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 104 Accept-Ranges: bytes Cache-Control: max-age = 1433 Date: Tue, 08 Jul 2003 17:10:41 GMT Surrogate-Server: AkamaiGHost

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Size 439 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:23 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:48:52 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 439 Accept-Ranges: bytes Cache-Control: max-age = 2393 Date: Tue, 08 Jul 2003 17:10:42 GMT Surrogate-Server: AkamaiGHost

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Size 973 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:24 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:25:00 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:25 GMT Content-Length: 973 Accept-Ranges: bytes Cache-Control: max-age = 961 Date: Tue, 08 Jul 2003 17:10:42 GMT Surrogate-Server: AkamaiGHost

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Size 938 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:24 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:25:29 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 938 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost, AkamaiGHost Cache-Control: max-age = 990 Date: Tue, 08 Jul 2003 17:10:42 GMT

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Size 104 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:24 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:50:35 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:26 GMT Content-Length: 104 Accept-Ranges: bytes Cache-Control: max-age = 2496 Date: Tue, 08 Jul 2003 17:10:43 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/html/93103308/48441749/aol?SNM=HIDBFV&width=88&height=31&target=_top&TZ=240&TVAR=class%3Dus.low& CT=I

Size 377 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:09:01 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: text/html Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:16 GMT Date: Tue, 08 Jul 2003 17:10:16 GMT Content-Length: 377

http://i.a.cnn.net/cnn/.element/img/1.0/main/icon_premium.gif

Size 74 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:24 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:37:32 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 74 Accept-Ranges: bytes Cache-Control: max-age = 1713 Date: Tue, 08 Jul 2003 17:10:43 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/html/93137910/48441749/aol?SNM=HIDBFV&width=101&height=1&target=_top&TZ=240&TVAR=class%3Dus.low&CT=J&hw=docw

Size 267 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:09:02 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: application/x- javascript Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:19 GMT Date: Tue, 08 Jul 2003 17:10:19 GMT Content-Length: 267

http://ar.atwola.com/file/adsEnd.js

Size 1551 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:09:11 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:09:02 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:27 GMT Date: Tue, 08 Jul 2003 17:10:27 GMT Content-Length: 1551 Content-Type: application/x- javascript

http://www.cnn.com/cookie.crumb

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:09:14 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 17:10:31 GMT Content-Length: 43 Content-Type: image/gif

Links

URL Total Score

Satellite

Bandwidth 40960, Compression 1.0, DNS Lookup 1.5, Ping Latency 1.5

Web Page Scoring

Parameters

Date Run Tue Jul 08 2003 13:12:24 GMT-0400 (Eastern Daylight Time) Bandwidth 40960 Compression 1 DNS Lookup Time 1.5 Ping Latency 1.5 Revisit Time 86400 IntraPage Time 60 User Perception Time 10 Page: http://cnn.com/Score13.18

Page Scores

Blocking Total First Visit 1.8 13.18 Second Visit 1.8 13.02 Notes consider reducing redirections consider reducing domain lookups consider moving external scripts to inline or reducing domain lookups consider moving external css to inline or reducing domain lookups first visit: blocking latency dominates size second visit: blocking latency dominates size

Summary Statistics

Actual Load Time 42.872 Total Size 173885 Document Compressed false Redirects 2 Total Domains 5 Blocking Domains 4 Non Blocking Domains 1 Domains cnn.com, www.cnn.com, i.cnn.net, ar.atwola.com, i.a.cnn.net Extra Whitespace 5149 Inline Script Count 6 Inline Script Size 1236 External Script Count 11 External Script Size 35033 Inline Style Count 1 Inline Style Size 110 External Style Count 3 External Style Size 25910 DOM Depth 26 Table Depth 5

http://cnn.com/

Size 0 Binary false Blocking false Redirected to http://www.cnn.com/ Modified Tue Jul 08 2003 13:08:42 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 302 Moved Temporarily Server: Netscape-Enterprise/6.1 AOL Date: Tue 08 Jul 2003 17:10:02 GMT Location: http://www.cnn.com/ Content-Length: 0 Content-Type: text/html

http://www.cnn.com/

Size 56730 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:08:52 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:09:42 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Tue, 08 Jul 2003 17:10:02 GMT Last-Modified: Tue, 08 Jul 2003 17:10:00 GMT Expires: Tue, 08 Jul 2003 17:11:00 GMT Cache-Control: private, max-age = 60 Content-Type: text/html

http://i.cnn.net/cnn/.element/ssi/css/1.0/main.css

Size 25910 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:51 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:45 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Wed, 25 Jun 2003 15:05:51 GMT Content-Type: text/css Last-Modified: Wed, 25 Jun 2003 15:04:29 GMT Content-Length: 25910 Accept-Ranges: bytes Age: 8543 X-Cache: HIT from i.cnn.net

http://i.cnn.net/cnn/.element/ssi/js/1.0/main.js

Size 21613 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:54 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:52 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Thu, 26 Jun 2003 03:34:13 GMT Content-Type: application/x- javascript Last-Modified: Mon, 17 Mar 2003 20:13:07 GMT Content-Length: 21613 Accept-Ranges: bytes Age: 787 X-Cache: HIT from i.cnn.net

http://ar.atwola.com/file/adsWrapper.js

Size 6039 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:57 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:08:55 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:11 GMT Date: Tue, 08 Jul 2003 17:10:11 GMT Content-Length: 6039 Content-Type: application/x- javascript

http://ar.atwola.com/file/adsPopup2.js

Size 5563 Binary false Blocking true Redirected to Modified Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) Expires Wed Jul 09 2003 13:08:57 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.1 200 OK Expires: Wed, 09 Jul 2003 17:10:14 GMT Date: Tue, 08 Jul 2003 17:10:14 GMT Content-Length: 5563 Content-Type: application/x- javascript

http://i.cnn.net/cnn/images/1.gif

Size 43 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:08:58 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Date: Fri, 20 Jun 2003 15:36:44 GMT Content-Type: image/gif Last-Modified: Tue, 27 May 2003 19:00:10 GMT Content-Length: 43 Accept-Ranges: bytes Age: 2813 X-Cache: HIT from i.cnn.net

http://i.a.cnn.net/cnn/.element/img/1.0/logo/cnn.gif

Size 1910 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 14:02:08 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:48:24 GMT Content-Length: 1910 Accept-Ranges: bytes Cache-Control: max-age = 3190 Date: Tue, 08 Jul 2003 17:10:17 GMT Surrogate-Server: AkamaiGHost

http://ar.atwola.com/html/93103287/48441749/aol?SNM=HIDBFV&width=468&height=60&target=_top&TZ=240&TVAR=class%3Dus.low&CT=I

Size 402 Binary false Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Wed Dec 31 1969 19:00:00 GMT-0500 (Eastern Standard Time) HTTP Header HTTP/1.1 200 OK Content-Type: text/html Pragma: no-cache Cache-Control: no-cache Expires: Tue, 08 Jul 2003 17:10:15 GMT Date: Tue, 08 Jul 2003 17:10:15 GMT Content-Length: 402

http://i.a.cnn.net/cnn/.element/img/1.0/searchbar/bar.search.gif

Size 1107 Binary true Blocking false Redirected to Modified Tue Jul 08 2003 13:08:59 GMT-0400 (Eastern Daylight Time) Expires Tue Jul 08 2003 13:20:05 GMT-0400 (Eastern Daylight Time) HTTP Header HTTP/1.0 200 OK Server: Netscape-Enterprise/6.1 AOL Content-Type: image/gif Last-Modified: Mon, 09 Jun 2003 19:49:26 GMT Content-Length: 1107 Accept-Ranges: bytes Surrogate-Server: AkamaiGHost, AkamaiGHost Cache-Control: max-age = 667 Date: Tue, 08 Jul 2003 17:10:17 GMT

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Links

URL Total Score

Results

Dialup Cable Satellite Blocking Total Blocking Total Blocking Total First Visit First Visit First Visit 1.32 0.76 1.8 5.17 2   13.18 Second Visit Second Visit Second Visit 1.32 0.76 1.8 5.13 1.98 13.02

Because each example report uses the same Perception Time value of ten seconds, these reports imply that that it takes a Dialup visitor approximately 50 seconds to load CNN the first time, a Cable visitor 20 seconds and a Satellite visitor over 130 seconds.

These reports also indicate that for visitors who only visit CNN once per day, caching provides no benefit for their first visit of the day.

Heuristics Description

The Web page scoring tool uses the time to perform DNS lookups, round trip time for requests, download size and bandwidth and the blocking nature of external CSS and JavaScript files to determine a calculated download time. This download time is scaled by the Visitor Perception Time parameter to determine a score.

FIGS. 2 a-2 l illustrate a Web page report according to the invention. The report shown in FIGS. 2 a-2 l was generated for the Web page http://slashdot.org/ and is readily contrasted by a report generated by a state of the art product, as shown in FIGS. 1 a-c, for the same Web page. As shown on FIG. 2 a, a total score 21 is provided for a Web page. The total score is followed a score details 22, which include an incremental layout score 23 and a latency score 24. The report provides download scores 25, documents statistics 26, 27, details of the document Head 28 and details of the body tag 29. As well, the invention also provides details of the child elements of the body tag 30, which are organized as a series of tables, one table for each child element, where each table contain information regards the child element key, dataSize, fetchCount, lastFetched date, lastModified date, expirationTime, and responseHead.

While the report shown in FIGS. 2 a-2 l includes the various factors identified above, those skilled in the art will appreciate that the invention may provide reports in any other format as desired, including such factors as may be of interest.

FIGS. 3 a and 3 b provide a flow diagram of a method for Web page performance scoring using a browser-based tool according to the invention. The presently preferred embodiment of the invention comprises a browser-based tool that loads a Web page (100), accesses the document object model (DOM) of the page (110), collects information about the page structure (120), and determines through the use of heuristics such factors as how much text is found on the page, download time, and the like (130), produces a statistical breakdown of the page (140), and calculates a score based on performance of the page relative to an ideal performance score (150).

Key to the operation of the invention is the ability to observe operation of the Web page in real time as it is loading, further determine performance after a second (cached) load (160), score the page for several of various performance factors (170), and produce a combined score for the various factors (180).

One presently preferred embodiment of the invention comprises a tool that has been implemented as a special Web page hosted in a Netscape 7.0x/Mozilla (see http://channels.netscape.com/ns/browsers/default.jsp) sidebar. The tool uses a JavaScript™, see http://devedge.netscape.com/central/javascript/ (ECMAScript—see http://www.ecma-international.org/publications/standards/ECMA-262.HTM: Standard Ecma-262 ECMAScript Language Specification 3rd edition (December 1999)), standards based mechanism for access to the Web page document structure by means of the W3C DOM (see http://www.w3.org/DOM/) application programming interface, as well as access to internal services exposed by the Netscape 7/Mozilla browser to access file cache and size information.

The tool is readily extended to operate using Netscape 7/Mozilla in batch mode for automated reporting. Implementations in Perl (see http://www.perl.com/) are also currently being considered.

Further, those skilled in the art will appreciate that any other browser, e.g. Microsoft's Internet Explorer, may be used in connection with the invention disclosed herein. Thus, the tool is readily implemented in different environments if the following components normally found in a Web browser are available:

-   -   An HTML/XML Parser     -   A JavaScript engine     -   Representation of the input document as an object model such as         the W3C Document Object Model     -   Ability to determine HTTP headers returned by the Web server and         effective file caching for the Web page and the Web page         referenced files.

Although the invention is described herein with reference to the preferred embodiment, one skilled in the art will readily appreciate that other applications may be substituted for those set forth herein without departing from the spirit and scope of the present invention. For example, the invention allows the scoring of cached vs. uncached versions of a page. Additionally, the invention is readily implemented in a system the does not comprise a browser, e.g. in PERL, etc. It is also possible to operate the invention such that it runs without user interaction and observation, for example on a server.

Accordingly, the invention should only be limited by the Claims included below. 

1. An apparatus for dynamic Web page performance scoring, comprising: a tool for accessing Web page structure in connection with the real time loading, display, and operation of a Web page; said tool comprising a module for analyzing a plurality of Web page metrics related to said Web page while said Web page is running; said tool comprising a module for receiving information about said Web page that is generated while analyzing said Web page metrics; said tool comprising a heuristic mechanism for calculating a performance subscore for each of said metrics; and said tool comprising a module for combining said performance subscores for said metrics to produce at least one interpretable Web page performance score.
 2. The apparatus of claim 1, said tool comprising a browser-based tool.
 3. The apparatus of claim 1, said tool comprising a module for loading a Webpage, accessing a document object model (DOM) of said page, collecting information about page structure and parsing said page.
 4. The apparatus of claim 1, said heuristic mechanism calculating any of how much text is found on a page, number of domains, and outside files; producing a statistical breakdown of said page; and calculating a score based on performance of said page.
 5. The apparatus of claim 1, said tool comprising a module for measuring relative performance of Web pages interactively as they are being developed.
 6. The apparatus of claim 1, said tool comprising a process control measurement tool, which is run automatically, to determine performance scores for an entire Web site.
 7. The apparatus of claim 1, comprising: a module for calculating a score which measures potential page load performance of pages in a Web site for visitors with varying network performance characteristics.
 8. The apparatus of claim 1, wherein said tool visits any of a single page and all pages linked from a page up to a specified depth, while providing scores, overall statistics, and details for each included file.
 9. The apparatus of claim 1, comprising a module for scoring of cached vs. uncached versions of a page.
 10. The apparatus of claim 1, said heuristic mechanism using user data, connection data, and DOM data for generate a first-load and second-load score for a browser.
 11. A method for dynamic Web page performance scoring, comprising the steps of: loading a Web page; accessing said Web page structure in connection with the real time loading, display, and operation of said Web page; collecting information relating to a plurality of Web page performance metrics in connection with the real time loading, display, and operation of said Web page; calculating a performance subscore for each of said metrics with a heuristic mechanism; and using said collected information to calculate at least one interpretable Web page performance score.
 12. The method of claim 11, said method implementing a tool comprising a browser-based tool.
 13. The method of claim 11, comprising the steps of: loading a Web page; accessing a document object model (DOM) of said page; and collecting information about page structure and parsing said page.
 14. The method of claim 11, comprising the step of: said heuristic mechanism calculating any of how much text is found on a page, number of domains, and outside files; producing a statistical breakdown of said page; and calculating a score based on performance of said page.
 15. The method of claim 11, comprising the step of: measuring relative performance of Web pages interactively as they are being developed.
 16. The method of claim 11, comprising the step of: providing a process control measurement tool, which is run automatically, to determine performance scores for an entire Web site.
 17. The method of claim 11, comprising the step of: calculating a score which measures potential page load performance of pages in a Web site for visitors with varying network performance characteristics.
 18. The method of claim 11, wherein said tool visits any of a single page and all pages linked from a page up to a specified depth, while providing scores, overall statistics, and details for each included file.
 19. The method of claim 11, comprising the step of scoring of cached vs. uncached versions of a page.
 20. The method of claim 11, wherein said heuristic mechanism uses user data, connection data, and DOM data for generate a first-load and second-load score for a browser. 